Feeding device for jointers.



H. B. ROSS & J. P. GATES. FEEDING DEVICE FOR JOINTERS. APPLIUATION FILEDDEO.2,1 907.

2 sums-4:11am 1.

Patented Mar. 2 1909.

H. B. ROSS & J. P. GATES.

FEEDING DEVICE FOR JOINTERS.

- APPLICATION FILED DBO.2,1907. I 91 3,852. Patented Mar. 2, 1909.

. 2 SHEETS-SHEET 2.

UNITE STATES PATENT OFIEKQE.

HARRY B. ROSS AND JOHN P. GATES, OF BELOIT, WISCONSIN, ASSIGNORS TO THEBERLIN MACHINE WORKS, OF BELOIT, WISCONSIN, A CORPORATION OF WISCONSIN.

, FEEDING DEVICE FOR JOINTERS.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed December 2, 1907. Serial No. 404,678.

widely different types and styles will be made apparent from thefollowing detailed description of one embodiment of the invention in aglue jointer. In this improved construction the boards to be joined arefed to the machine edgewise and are advanced to the planer headsandiknives and prevented from rising from the same or varying theirposition, except by their forward travel, by a feeding de vicecomprising in the present instance a pair of rotatable wheels or pulleysnotched or recessed on their cylindrical peripheries, a metallic band orbelt passed around the wheels and having on its inner face a pluralityof blocks or teeth shaped to conform to the recesses and adapted toenter the same as they pass around the wheels, whereby slipping of theband or belt is entirely prevented, and stretching of the same isobviated because of the material of which it is made, in the case underconsideration spring steel. The outer surface of the band or endlessstrapis equipped with a plurality or series of face or conveyer blocksforming a traveling bed or surface against which the boards are firmlypressed to prevent dislodgment or displacement by a row of stationaryspring-actuated pressure-rollers on a pressure-bar mounted so as to havea parallel motion toward and from the travel ing face blocks andadjustable by a manually-operated regulating screw. To hold the band orbelt and its block up to the work,

We sup ly one or more guides each composed.

of a ongitudinally divided guiding bar against one surface of which theband is pressed, while the face blocks have legs or extensionsoverlapping the top and bottom surfaces of the guide, whereby elevationor descent of the traveling conveyer is effectually prevented. By thisimproved constructionwe obtain a conveyer belt which is incapable ofstretching and which is always held in proper working position. In addition, owing to the parallel-motion mounting of the pressure bar and itsspring-actuated rollers, a single screw suffices to effect desiredadjustments.

On the accompanying drawings, forming a part of this specification, wehave illustrated one desirable embodiment of our invention, showing thesame applied to a glue jointer.

Figure 1 is a plan view of the machine; Fig. 2 is an enlargedcross-section on line 22 of Fig. 1 as viewed in the direction indicatedby the arrows; big. 3 is a section on line 3 of fig. 2; and Figs. 4, 5and 6 are details of the mounting of the spring-actuated pressurerollers.

Referring first to Fig. 1, it will be noticed that at the opposite endsof the main supporting frame or table 10 is a pair of hori zontalrotatable wheels or pulle s 11 and 12, the latter of which is driven ymeans of shaft 18 and an intermediate mechanism not illustrated. Thecylindrical surface or periphery of each of these wheels or pulleys 11and 12 is supplied with a series of tapered notches or recesses 14equally spaced apart around the entire circumference of the wheels.Passing around these wheels or pulleys is an endless metallic band orbelt 15 which has on its inner surface, and spaced apart to correspondto the distance between the notches 14, a series or plurality of taperedblocks or teeth 16 shaped to conform in Slide and contour to therecesses 14, whereby as the band or belt 15 passes around the wheelsthese teeth 16 enter the notches or grooves 14 exactly filling thespaces of the recesses 14 so that slipping of the belt or metallic bandis entirely prevented. Substantially the entire outer face of theendless metal band 15 is covered with a series of face or conveyingbloclts 17 which are fastened individually to the teeth 16 by suitablescrews 18 eX- tending through apertures in the metal band and whoseouter surfaces are plane and flat so that these outer faces on thestretches of the hand between the pair of com )anion wheels formsubstantially flat vertical traveling surfaces. Adjacent to and insideof the long stretches of the band 15 are guides 19 and 20, each of whichis composed of a long base portion 21 bolted at 22 to the bed or frame10 of the machine, and having on its face toward the band a bottomrecess 23 an outwardly projecting longitudinal strip and an upper recess25. Bolted to the top of each of these longitudinal bars or guides 21 isanother portion 26 having a base 27 resting on the top surface of thelower bar 21 and fastened thereto by the bolts 28. On its front faceeach bar 26 has a lower recess 29 and an outwardly-projecting portion30. As is apparent from an inspection of Fig. 2, the two recesses and 29together or unitedly form a single longitudinal slot or groove on theface of the guide for the accommodation of the teeth or blocks 16 asthey pass along. The upper and lower inner portions of the metallic bandor belt 15 rest against the front faces of the projections 24 and 30,while the parallel tapered extensions or legs 31 and 32 at the top andbottom of each face block 17 overlie and underlie, respectively, the topand bottom surfaces of the projections and 24.

In order to press or force the boards, the edges of which are to beplaned, against the traveling bed or series of conveyer blocks 1'7 atboth sides of the machine, we provide a pressure-bar 33 having adepending flange portion 34 and a top inwardly-extended part 35 equippedor supplied with a plurality of apertured bosses 36 through each ofwhich extends a vertical bolt 37, on the lower portion of which ismounted, so as to turn, an arm 33 having at one end a perforated boss 39through which passes a bolt 40 on the lower end of which apressure-roller 41 is' rotatable. Adjacent to each boss 36 aninwardly-extended web or bracket 42 connects the portions 34 and 35 ofthe pressure bar 33, and passing through a hole 43 of each of thesebrackets is a bolt 44, encircling which is a spring 45 disposed betweenthe head 46 of the bolt and a bifurcated extension 47 of the arm 38which straddles the bolt 44. It is obvious that the action of thisspring is to turn the roller 41 toward the metallic band 15 and itsattached blocks, and in order to limit this movement we provide astop-screw 48 which passes through one of the legs of the bifurcatedpart 47 and normally abuts against an adjacent bracket 42. A look nut 49may be used if desired to prevent loosening or unturning of this screw.

The two ends of the pressure bar 33 are connecetd to suitable uprightstuds or shafts 50 by means of a pair of parallel links 51 of equallength whic give the pressure bar a parallel motion, as is obvious. inorder to adjust each of these bars and its series of rollers, we providethe same with an adjustment screw 52, the turning of which will regulatethe position of the rollers and determine the pressure applied by' thesame to the boards.

The device has a pair of planer heads 53 with the usual cutters to planeor smooth off the edges of the boards which travel between the centralconveyer and the rollers 41. It is to be understood that suflicientpressure is put upon the boards as they are fed edgewise through the twosides of the machine by the rollers to thrust the boards against theblocks 17 to prevent dislodgmentor displacement of the boards while theyare being acted upon by the cutters,

the travelingconveyer carrying the boards along and feeding them throughthe machine, as is obvious.

To those skilled in the art it will be apparent that by using the metalband or belt described above the traveling conveyer has no stretchingqualities, and for that reason we are enabled to advantageously use bothlong stretches of the conveyer belt as advancing means for the boardsfed to the planer cutters. A machine of this kind does not possess thedisadvantages of sprocket chains or the like, which after acomparatively short time of usage become worn to such an extent at thepivotal connections of the links with one another that it is necessaryto discard them. The employment of the blocks or teeth 16 of exactly thesame shape and size as the recesses of the pulleys or wheels preventsany possible slipping of the conveyer, and to some extent acts asdriving means for the same. We have shown the two guides for theconveyer band as divided longitudinally so that if the inner surfaces ofthe extensions 31 and 32 of the face block 17 or the co-acting surfacesof the guide become worn, fillers may be placed between the two portionsof the guide to increase its depth or width. By this means of guidingthe band or belt any possibility of vertical movement or shifting of thesame is entirely prevented.

Although we have described and illustrated only one embodiment of ourinvention, it is to be understood that a feeding mechanism of thischaracter is a plicable for use in machines of various kin s, and it isfurther to be noted that the invention is not limited to the precisestructural details set forth, but that the construction may be variedwithin wide limits without departing from the spirit or essence of theinvention or sacrificing any of its benefits or advantages.

We claim:

1. In a feeding mechanism for machines of the character described, thecombination of a pair of wheels or pulleys with notched or re cessedperipheries, a metallic band passed. around said wheels or pulleys,blocks or teeth on the inner surface of said band shaped to conform tosaid notches or recesses and adapted to enter the same as the bandtravels, a grooved guide between said wheels or pulleys along one faceof which said band is adapted to travel, the groove of the guideaccommodating said blocks or teeth, a series of face.

blocks on the outer surface of said band, each of said face blockshaving extensions adapted to overlap the'opposite faces of said guide,and'means to press boards or the like against said face blocks, theguide holding the band and face blocks up to the boards, substantiallyas described.

2. In a feeding mechanism for machines of the character described, thecombination of an endless traveling conveyer having an endless metallicband, a pressure bar, a parallel motion mounting for said pressure bar,a single screw to adjust said pressure bar toward and from saidconveyer, and a plurality of spring-pressed rollers on said pressure baradapted to press a board or the like against said conveyer,substantially as described.

3. In a feeding mechanism for machines of the character described, thecombination of a pair of Wheels vvith notched or recessed peripheries,an endless metallic band passed around said Wheels, blocks or teeth onthe inner surface of said band adapted to enter said notches or recessesas the band travels, a series of face blocks on the outer surface ofsaid band constituting an endless traveling conveyer, a pressure bar, aparallel motion mounting for said pressure bar, means to adjust saidpressure bar toward and from said metallic band, and a plurality ofrollers mounted on said pressure bar, and adapted to engage boards andpress them against said face blocks substantially as described.

4. In a feeding mechanism for machines of the character described, thecombination of a pair of wheels or pulleys u ith notched or recessedperipheries, an endless metallic band passed around said heels orpulleys, blocks or teeth on the inner surface of said band shaped toconform to said notches or recesses and adapted to enter the same as theband travels, a guide between said wheels or pulleys along one face ofwhich said band is adapted to travel, a series of face blocks on theouter surface of said band, a pressure bar, a parallel-motion mountingfor said pressure bar, a single screw to adjust said pressure bar towardand from said metallic band, and a plurality of spring-pressed rollerson said pressure bar, and adapted to engage boards and press themagainst said face blocks substantially as described.

HARRY B. ROSS. JOHN P. GATES.

Witnesses to the signature of Harry B. Ross:

J. A. THORSON, F. L. LANE. Witnesses to the signature of John P. Gates:

L. M. RANDALL, W. S. PERKINS.

